Fred Sommer
type: MusicGroup
genre: mpb
genre: nova mpb
popularity: 3
followers: 67
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x21c3f7cff2db0331d1cb6a6f1ec77018ccce891b6835f47fcbc4afb3335468f9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954046
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954046
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40377277-c60e-48ce-9a53-15cfd7d77f06.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40377277-c60e-48ce-9a53-15cfd7d77f06.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/40377277-c60e-48ce-9a53-15cfd7d77f06
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:53:03Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x21c3f7cff2db0331d1cb6a6f1ec77018ccce891b6835f47fcbc4afb3335468f9","name":"Fred Sommer","registered_at":"2026-06-16T12:13:58Z","symbol":"NIM1048609","token_address":"0x683d358a16f26e9a51e46ed864e0b0ad0a892edb","type":"artist","uuid":"40377277-c60e-48ce-9a53-15cfd7d77f06"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c3f7cff2db0331d1cb6a6f1ec77018ccce891b6835f47fcbc4afb3335468f9. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40377277-c60e-48ce-9a53-15cfd7d77f06.json and https://artists.proofprofile.net/proofs/artist/40377277-c60e-48ce-9a53-15cfd7d77f06.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T04:53:03Z
  text: {"copyright_id":"0x21c3f7cff2db0331d1cb6a6f1ec77018ccce891b6835f47fcbc4afb3335468f9","name":"Fred Sommer","registered_at":"2026-06-16T12:13:58Z","symbol":"NIM1048609","token_address":"0x683d358a16f26e9a51e46ed864e0b0ad0a892edb","type":"artist","uuid":"40377277-c60e-48ce-9a53-15cfd7d77f06"}